envoy up to 1.34.12/1.35.8/1.36.4/1.37.0 getAddressWithPort denial of service

Summaryinfo

A vulnerability has been found in envoy up to 1.34.12/1.35.8/1.36.4/1.37.0 and classified as problematic. Impacted is the function Utility::getAddressWithPort. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2026-26310. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in envoy up to 1.34.12/1.35.8/1.36.4/1.37.0. This affects the function Utility::getAddressWithPort. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-26310 since 02/13/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.34.13, 1.35.9, 1.36.5 or 1.37.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0704). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Google Cloud Platform

Productinfo

Name

• envoy

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.34.0
• 1.34.1
• 1.34.2
• 1.34.3
• 1.34.4
• 1.34.5
• 1.34.6
• 1.34.7
• 1.34.8
• 1.34.9
• 1.34.10
• 1.34.11
• 1.34.12
• 1.35
• 1.35.0
• 1.35.1
• 1.35.2
• 1.35.3
• 1.35.4
• 1.35.5
• 1.35.6
• 1.35.7
• 1.35.8
• 1.36
• 1.36.0
• 1.36.1
• 1.36.2
• 1.36.3
• 1.36.4
• 1.37.0

License

• free

CPE 2.3info

• 🔒
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CPE 2.2info

• 🔒
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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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